Arthonia excipienda (Nyl.) Leight.
Lich. Fl. Gr. Brit.: 393, 1871. Basionym: Arthonia astroidea var. excipienda Nyl. - Not. Sällsk. Fauna. Fl. Fenn., 4: 252, 1859.
Synonyms: Arthonia cytisi var. meridionalis Zahlbr.; Arthonia dispersa var. excipienda (Nyl.) H. Olivier; Arthonia hibernica Nyl.
Description: Thallus crustose, endosubstratic and usually poorly evident, sometimes delimited by a dark prothalline line. Apothecia arthonioid, mostly lirelliform, up to 1.5 mm long and 0.3-0.5 mm wide, straight or curved, simple or rarely sparingly branched, with an initially slit-like, later somewhat expanded, brown, epruinose disc, and a slightly raised marginal zone. Proper exciple evident, containing remains of bark cells, 12-40 µm wide, dark brown, the pigment K+ pale green; epithecium pale brown to olive-brown; hymenium colourless, not inspersed with oil droplets, (30-)40-40(-80) µm high, I+ blue; paraphysoids 1-1.5 µm thick, without apical brown caps; hypothecium thin, colourless. Asci 8-spored, broadly clavate, semi-fissitunicate, with a large apical dome and a distinct ocular chamber, Arthonia-type. Ascospores 1-septate, hyaline, ovoid, (14-)15-20(-23) x 5-8(-10) µm. Photobiont absent, but thallus reported to be loosely associated with trentepohlioid and/or chlorococcoid algae. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Fungus
Substrata: bark
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: very rare
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Occurrence data
Predictive map
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Coast Ranges, near Bute Inlet. Photographed from specimen (Björk 19763, UBC), on trunk of large Populus trichocarpa in rainforest. 2009-09-04
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Coast Ranges, near Bute Inlet. Photographed from specimen (Björk 19763, UBC), on trunk of large Populus trichocarpa in rainforest. 2009-09-04
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Coast Ranges, near Bute Inlet. Photographed from specimen (Björk 19763, UBC), on trunk of large Populus trichocarpa in rainforest. 2009-09-04
Growth form: Fungus
Substrata: bark
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: very rare
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Coast Ranges, near Bute Inlet. Photographed from specimen (Björk 19763, UBC), on trunk of large Populus trichocarpa in rainforest. 2009-09-04
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Coast Ranges, near Bute Inlet. Photographed from specimen (Björk 19763, UBC), on trunk of large Populus trichocarpa in rainforest. 2009-09-04
